All categories

2 years ago

If f(x) = 2x² - 6x + 8, find f(a - 2).

Mathematics

1 answer:

yan [13]2 years ago

7 0

Answer: f(a-2) = 2a² - 14a + 28

Step-by-step explanation:

f(x) = 2x² - 6x + 8

you can take a-2 and substitute it for each x, which would look like this:

f(a-2) = 2(a-2)² - 6(a-2) + 8

then distribute those in ( )

f(a-2) = 2a² - 8a + 8 - 6a + 12 + 8

combine like terms

f(a-2) = 2a² - 14a + 28

You might be interested in

Give the formula for the area of the following shapes. .

mamaluj [8]

Let's go shape by shape!

The area of a rectangle can be calculated as follows:

$L * W = area$ where L = length and W = width

The area of a trapezoid can be calculated as follows:

$\frac{( b_{1} + b_{2})*H}{2} = area$
where b1 and b2 = lengths of the base and H = height of the shape

The area of a parallelogram can be calculated as follows:

$B * H = area$ where B = length of the base and H = height of the shape

3 0

3 years ago

Help me with all three problems please this is due tommorow and I don't wanna fail this semester!

Vinil7 [7]

Ahh I hate those books; alright, check out this picture for the answers.

3 0

3 years ago

In the roof truss, line BG bisects ∠ABC and ∠DEF, m∠ABC= 112°, and ∠ABC≅∠DEF.

Dennis_Churaev [7]

In the given diagram, line BG bisects ∠ABC and ∠DEF, m∠ABC= 112°, and ∠ABC≅∠DEF. So the measure of angles are :

1. m∠DEF= 112° because ∠ABC≅∠DEF

2. m∠ABG= 56° because a straight line BG is bisecting ∠ABC in two equal parts. So, $\frac{112}{2} = 56$

3. m∠CBG= 56° because ∠ABG and ∠CBG are equal.

4. m∠DEG= 56° because ∠ABG ≅ ∠DEG

7 0

3 years ago

Read 2 more answers

When x equals 12 , x+3y=21 need help

crimeas [40]

Answer:

y=3

Step-by-step explanation:

6 0

2 years ago

Simplify Show your work.<br><br>513 +-3918

Orlov [11]

Answer:

-3405

Step-by-step explanation:

So first you subtract 513 from 3918.

This way, you are doing basically an additive inverse.

So you so that and you get the answer. Because you are adding a negative, you are taking away from the positive and going into the negative, which would give you -3,405.

Hope this helped you a little!!^_^

7 0

3 years ago